test_pin_operator_digests: remove unused function
test_pin_operator_digests: remove unused function

* CLOUDBLD-8112

Signed-off-by: Harsh Modi <10511c7e5917154b560827e1a03cf4f47a4f7efa@redhat.com>

projectatomic/atomic-reactor,fr34k8/atomic-reactor,fr34k8/atomic-reactor,projectatomic/atomic-reactor